Table Of Contents - HP StorageWorks P9000 User Manual

Contents
1 Continuous Access Synchronous Z overview...................................................8
How Continuous Access Synchronous Z works .............................................................................8
Typical components .................................................................................................................9
Disk arrays..............................................................................................................................9
Main (MCU), remote (RCU) disk arrays.................................................................................10
Volume pairs .........................................................................................................................10
Data path .............................................................................................................................11
Consistency groups ................................................................................................................11
Interfaces ..............................................................................................................................11
Failover software ...................................................................................................................11
Error reporting communications ...............................................................................................12
Overview of initial, update copy operations ..............................................................................12
Initial copy .......................................................................................................................12
Update copy ....................................................................................................................12
2 Requirements and specifications.................................................................14
System requirements ...............................................................................................................14
BCM specifications ................................................................................................................15
Command device ..............................................................................................................18
F/M = FB message output control option when operating R-VOLs.............................................18
PPRC specifications, restrictions ................................................................................................19
Continuous Access Synchronous Z operations performed with PPRC .........................................19
Continuous Access Synchronous Z options not supported with PPRC .........................................19
PPRC, BCM command comparison.......................................................................................20
P/DAS support, restrictions .....................................................................................................21
Restrictions........................................................................................................................21
GDPS support .......................................................................................................................22
RMF PPRC Link-path statistical information support.......................................................................22
TPC-R cooperation support.......................................................................................................24
Cache failure....................................................................................................................25
Unregistered error code for TPC-R........................................................................................25
3 Planning for Continuous Access Synchronous Z.............................................27
Preparing P9500 disk arrays....................................................................................................27
Ensuring adequate cache....................................................................................................27
Installing or removing cache memory/shared memory............................................................27
Using DASD fast write........................................................................................................28
Using an earlier model storage system..................................................................................28
Enabling R-VOL Read, other system options...........................................................................28
Planning for system performance..............................................................................................30
Planning volume pairs.............................................................................................................31
Volume pair requirements and recommendations....................................................................31
Handling duplicate VOLSERs ..............................................................................................32
Planning I/O to the R-VOL...................................................................................................33
Managing differential data.................................................................................................33
Maximum number of pairs supported...................................................................................33
Calculating maximum number of pairs.............................................................................33
Priority set for initial copy operations and scheduling order.....................................................35
Planning data paths................................................................................................................36
Contents 3